Background: Although many neuropsychiatric syndromes are associated wi
th multiple sclerosis, few recent studies have examined the clinical f
eatures of psychiatric illness in inpatients with multiple sclerosis.
Florid psychopathology can obscure neurologic symptoms in multiple scl
erosis. It is therefore important to consider the range of severe psyc
hiatric states that can occur in multiple sclerosis and the frequency
with which multiple sclerosis patients are seen in inpatient facilitie
s. Method: We examined records for 2720 consecutive admissions to thre
e psychiatric units and conducted a chart review comparing the DSM-III
psychiatric diagnoses of patients with multiple sclerosis with those
of the inpatient population as a whole. Results: The 10 patients with
multiple sclerosis were significantly more likely to present with hist
ories of mania and manic psychosis than the inpatient population as a
whole. Further, 7 of the 10 patients had psychiatric hospitalizations
before the multiple sclerosis diagnosis. In 4 of these 7 patients, a r
eview of the medical record documented neurologic symptoms that were n
ot recognized as typical of multiple sclerosis. Three of these 4 patie
nts were psychotic and the fourth was catatonic at the time of their a
dmissions. Conclusion: While multiple sclerosis patients account for a
small proportion of all psychiatric admissions, clinicians should con
sider the diagnosis of multiple sclerosis in patients exhibiting manic
symptoms in tandem with unexplained neurologic findings.